Cambodia

The territory of present-day Cambodia has been inhabited since prehistoric times, with archaeological sites such as Laang Spean documenting human presence dating back tens of thousands of years. By the early centuries of the Common Era, the lower Mekong basin hosted the polity known to Chinese chroniclers as Funan, an Indianised trading state whose ports linked maritime Southeast Asia to India and China. Funan was succeeded from the sixth century by Chenla, a collection of inland principalities centered on the middle Mekong, which laid the cultural and political groundwork for the unified state that followed.

In 802, Jayavarman II proclaimed himself universal monarch on the slopes of Phnom Kulen, an act conventionally taken as the founding of the Khmer Empire. Centered successively on Hariharalaya, Yasodharapura, and the great temple complexes around Angkor, the empire reached its zenith between the eleventh and thirteenth centuries under rulers such as Suryavarman II, who commissioned Angkor Wat, and Jayavarman VII, who built the Bayon and consolidated a Mahayana Buddhist state. From the fourteenth century the empire declined under pressure from the rising Tai polity of Ayutthaya, environmental strain on its hydraulic system, and a gradual shift of population toward the lower Mekong; the court eventually abandoned Angkor in the fifteenth century and relocated southward to the area of present-day Phnom Penh.

For the next four centuries the Cambodian kingdom survived as a weakened polity squeezed between Siam to the west and the expanding Vietnamese Nguyen state to the east, periodically losing territory and accepting tributary obligations to one or both neighbors. In 1863, King Norodom signed a protectorate treaty with France, bringing Cambodia into French Indochina alongside Vietnam and Laos. Colonial rule preserved the monarchy in a ceremonial role while restructuring administration, taxation, and infrastructure, and it left a lasting French imprint on the legal system and urban planning of Phnom Penh.

Cambodia regained full independence on 9 November 1953 under King Norodom Sihanouk, who abdicated in 1955 to govern as prime minister and head of state. Sihanouk was overthrown in 1970 by Lon Nol, whose Khmer Republic became a battleground in the wider Indochina conflict. In April 1975 the Communist Party of Kampuchea, known as the Khmer Rouge and led by Pol Pot, captured Phnom Penh and imposed Democratic Kampuchea, a radical agrarian regime under which an estimated 1.5 to 2 million people died from execution, forced labor, starvation, and disease. A Vietnamese invasion in late 1978 ousted the Khmer Rouge in January 1979 and installed the People's Republic of Kampuchea, while remnant factions continued an armed struggle from the western borderlands throughout the 1980s.

The 1991 Paris Peace Accords ended the civil war and authorized the United Nations Transitional Authority in Cambodia, which organized elections in 1993. A new constitution that year restored the monarchy under Sihanouk and established a parliamentary system, with Hun Sen of the Cambodian People's Party emerging as the dominant political figure over the following decades. King Norodom Sihamoni acceded to the throne in 2004, and in 2023 Hun Sen handed the premiership to his son Hun Manet following a general election. Cambodia today is a constitutional monarchy with a bicameral legislature, in which the king serves as head of state and an elected prime minister leads the government.